Which of the following statements is correct regarding EIGRP manual summarization?
(Select the best answer.)

A.
Manual summarization is configured in interface configuration mode.

B.
Manual summarization must occur on classful bit boundaries.

C.
Manual summarization is enabled by issuing the no ip summary-address eigrp command.

D.
Manual summarization is configured in global configuration mode.

E.
Manual summarization is enabled by issuing the no auto-summary command.